View Compilation Error

0_0_22084413_10909.cpp: In function 'void dfs0(int)':
0_0_22084413_10909.cpp:44:2: error: 'ed' was not declared in this scope
  ed[x] = tim;
  ^
0_0_22084413_10909.cpp: In function 'void ins(int, int)':
0_0_22084413_10909.cpp:59:30: error: 'ed' was not declared in this scope
   modify(dfn[u], -1), modify(ed[u] + 1, 1);
                              ^